CCS Technical Documentation
System Module and User Interface
NSB-9
Issue 1 04/03
Nokia Corporation
Page 13
Baseband External and Internal Signals and Connections
This section describes the external and internal electrical connection and interface levels
on the baseband. Electrical interface specifications are collected into tables that covers a
connector or a defined interface.
Internal Signals and Connections
Table 6: FM Radio Interface
BB Signal
FM Radio
Signal
Min
Nom
Max
Condition
Note
VFLASH2
VCC
2.7V
2.78 V
2.86V
Analog supply voltage
6.0mA
8.4mA
10.5mA
Operational
3uA
6uA
Stand by
VDIG
2.7V
2.78V
2.86V
Digital supply voltage
2.1mA
3.0mA
3.9mA
Operational
11uA
19uA
26uA
Stand by
(bus enable
LOW)
GenIO(3)
FMClk
1.4V
0
1.8V
1.88V
0.4V
High
Low
Reference clock for
FM radio module
Also 6.5MHz or
13MHz can be used
32kHz
Frequency
GenIO(8)
FMWrEn
1.4V
0V
1.8V
1.88V
0.4V
High
Low
Write Enable
GenIO(11)
FMCtrlClk
1.4V
0
1.8V
1.88V
0.4V
High
Low
max. 1MHz
GenIO(12)
FMCtrlDa
1.4V
0
1.8V
1.88V
0.4V
High
Low
Bidirectional
FMANT
f
FM(ant)
76MHz
108MHz
FM input frequency.
Headset used as an
antenna.
FM_RADIO R
VAFR
720mV
850mV
940mV
f
RF
=98MHz,
V
RF
=1mV
FM-radio output sig-
nal (right) to amplifier
input
FM_RADIO L
VAFL
720mV
850mV
940mV
f
RF
=98MHz,
V
RF
=1mV
FM-radio output sig-
nal (left) to amplifier
input
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